Number of the records: 1  

Encyclopedia of earthquake engineering

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    SYSNO ASEP0450044
    Document TypeM - Monograph Chapter
    R&D Document TypeMonograph Chapter
    TitleEarthquake swarms
    Author(s) Horálek, Josef (GFU-E) ORCID, RID
    Fischer, T. (CZ)
    Einarsson, P. (IS)
    Jakobsdóttir, S. S. (IS)
    Source TitleEncyclopedia of earthquake engineering. - Berlin : Springer, 2015 / Beer M. ; Kougioumtzoglou I. A. ; Patelli E. ; Au I. S.-K. - ISBN 978-3-642-35343-7
    Pagess. 871-885
    Number of pages15 s.
    Number of pages3966
    Publication formPrint - P
    Languageeng - English
    CountryDE - Germany
    Keywordsclustering of events ; driving forces ; earthquake location
    Subject RIVDC - Siesmology, Volcanology, Earth Structure
    R&D ProjectsGAP210/12/2336 GA ČR - Czech Science Foundation (CSF)
    Institutional supportGFU-E - RVO:67985530
    AnnotationWe present a review of knowledge of earthquake swarms. They are sequences of numerous events closely clustered in space and time and do not have a single dominant mainshock. Earthquake swarms are observed worldwide, typically accompany volcanic activity but also occur in intracontinental areas. Many swarms exhibit the b-value of the frequency-magnitude distribution ≈ 1, which is also a typical b-value for mainshock-aftershock sequences. Depths of swarm earthquakes range approximately between 2 and 20 km with the majority of swarm events located around 10 km and shallower. Earthquake swarms exhibit usually pronounced migration of the foci, particularly the swarms that are closely connected with intrusion of dikes. The source mechanisms signify that the swarm earthquakes are mostly shear-slips along a fault just as ordinary tectonic earthquakes. Triggering mechanisms and driving are mainly related to activity of pressurised hydrothermal fluids, magma injection, or dyke intrusion, and also to aseismic loading by creeping faults. Accordingly, numerous models trying to explain the seismic-energy release in the form of earthquake swarms have been proposed.
    WorkplaceGeophysical Institute
    ContactHana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028
    Year of Publishing2016
Number of the records: 1